Output DC 0…10 V for VAV actuator and auxiliary output ON/OFF, PWM or 3-position or 3-position for VAV actuator and auxiliary output DC 0...10 V 3 multifunctional inputs for keycard contact, external room / return air temperature (1x, QAH11.1, QAA32), heat / cool changeover, operation mode changeover, window contact on/off, dewpoint monitor, electrical heater enabled, fault contact Operating modes: Comfort, Energy Saving and Protection Modulating PI control Control depending on the room or the return air temperature Automatic or manual heating / cooling changeover Adjustable commissioning and control parameters Minimum and maximum setpoint limitation Minimum and maximum limitation of air flow signal Output signal inversion (DC 0...10 V) as an option Backlit display Application selectable: Single-duct system Single-duct system with electrical heater Single-duct system and radiator / floor heating Single-duct system with heating / cooling coil